How to clean uPVC window sills

As uPVC is a low maintenance material, uPVC window sills are very straightforward to clean. You can keep them clean and looking their best using the following method:

  1. Remove any excess build-up of dirt by running the hoover over your window sills.
  2. Give them a good scrub using a non-abrasive sponge or cloth and a bucket of soft soapy water.
  3. Using a clean and dry non-abrasive cloth, dry the frame and remove any excess water.
  4. Sit back and enjoy your shining-looking sills!

Cleaning the sills is only one area of the window, however. There’s also the frame and the glass to think about!

Cleaning uPVC window frames

White bay windows It’s possible to restore uPVC window frames back to their original finish using the following method:

  • Remove excess dirt from the frames by going over them with the hoover.
  • Mix 1 cup of vinegar with 4 cups of hot water and pour the mixture into a sprayer.
  • Spray the mixture onto your uPVC window frames and leave to stand for about 10 minutes.
  • Using a clean and dry non-abrasive cloth, wipe down the frames and remove any excess liquid.

Cleaning uPVC window panes

Over time, the glass area of a window can become dirty, making it more difficult to see through to the other side. However, the following method can be used to keep any glass window panes looking their best:

  • Mix 2 cups of water with a ¼ cup of vinegar and ½ a cup of liquid soap.
  • Dip some old newspaper into the vinegar/liquid soap/water solution.
  • Using the old newspaper, wipe the windows in a circular pattern, making sure to remove any smears and dirty spots.

When cleaning the glass area of the window, also make sure to do so on days where it is not too hot or the sun is shining directly on the window. Otherwise, the glass can dry too quickly, resulting in a streaky finish.

Additional tips for cleaning uPVC windows

Green flush sash residence 9 windowNo matter which part of a uPVC window you’re cleaning, as long as you follow these tips, you can expect the best results:

  • Only clean using white cloths – if cleaning uPVC windows using a brightly coloured cloth, there is a chance of some of the fibre paint transferring onto the frame. This type of stain can also be very difficult to remove.
  • Always stick to non-abrasive cleaning solutions – if you’re finding it difficult to remove stubborn dirt from your window, you might be tempted to use a cleaning solution that is a bit stronger or an abrasive cleaning tool like a scouring pad. However, these can easily scratch the uPVC. So, if you do require a stronger cleaning chemical, opt for a specific uPVC cleaning product instead and stick to the soft cloths/sponges.

New or replacement uPVC windows in London and Hertfordshire

If you require new or replacement windows instead, Chase Windows can help. We provide high-quality, thermally efficient uPVC windows to homeowners across London and Hertfordshire. For more information or to request some for your home, give us a call on 020 8366 6500 or contact us online.


Over 11,000sq ft of space with of 6000 sq ft of purpose built showrooms, one of the largest home improvement showrooms in the North London, Hertfordshire and surrounding counties. With state of the art displays and kids area all under one roof.

Opening Hours: Monday – Friday 09:00 – 17:00 Saturday 10:00 – 16:00 Sunday 10:00 – 13:00


Smaller showroom with limited range available but good for client convenience.

Opening Hours: Monday – Friday 13:00 – 17:00 Saturday 10:00 – 16:00 Sunday By Appointment Only

Contact Us

Cobury House, Unit 1
11 Pindar Road
Hoddesdon, Herts
EN11 0BZ

189 Chase Side
Enfield, Middlesex

Tel: 0208 366 6500


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